I have two Panels on my webpage. These are parts of a 2-Step Configuration Wizard. When the page, first loads up, I want the First Panel i.e First Step to be already expanded and the Second Panel should be unexpanded. When the person clicks Continue on First Panel, pages refereshes and First Panel becomes unexpanded and the Second Panel becomes expanded. Can anyone please advise on how this could be achieved? The webpage is in asp.net using C# and CollapsiblePanelExtender in AJAX is being used for this particular task.